Hi Jin,
In fact you do not need to modify your context classes. All you have to do is to execute the exact same code that is provided in the documentation article on startup of your application, for example in the Application_Start method of your Global.asax.cs file. Here is the code with some more details:
Afterwards you will be able to use both context classes of the two models as well as all available persistent classes.
Kind regards,
Alexander
the Telerik team
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